Dishwashing machine



Dec. 11, 1923. 1,477,068

D. P. MAGANN DISHWASHING MACHINE Filed April 15. 1921 2 Sheets-Sheet 1WITNESSES D. P. MAGANN DISHWASHING MACHINE Dec. 11

2 Sheets-Sheet 1 Filed April 13 1.921

ATTOR N lY Patented Dec. 11,1923.

umreo STATES i,4?'Z,068 PATENT orricn.

DOUGLAS PLEASANT MAGANN, F ROANOKE, VIRGINIA, ASSIGNOR OF ONE-HALF '10 7DAVID E. ARGENBRIGHT, OF ROANOKE, VIRGINIA. I

DISHWASHING MACHINE.

, Application filed April 13, 1921. Serial No. 461,173.

To all whom it may concern:

Be it known that I, DOUGLAS P. MAGANN, a citizen of the United States,residing at Roanoke, in the county of Roanoke and State of Virginia,have inventeda new and 'useful Dishwashing Machine, of which the liftingpower of the buoyant supportingmeans for the dishes, which willbeproportionate to the weight of the dishes in the dish container. f

Another object of the invention is to provide the buoyant supportingmeans for the dish container in the form of a flotation chamber andhaving means for relieving pressure within the chamber when thecleansing bath is heated.

I A further object of the invention is to rovide a buoyant supportinmeans for the 15h container which will assist the operator in raisingthe dishes from the cleansin bath and necessarily decrease the amount 0work required to operate the machine.

The invention still further contemplates a novel operating means for thedish container in which friction between the elements of the operatingparts is at a minimum.

'The present machine is used for washing and rinsing dishes in a tubprovided with a cleansing bath in such a manner that water is not onlyforced through the dishes laterally-'butin an upward whirling motion sothat all portions of the dishes are thoroughly washed and treated bya'powerful surging movement of the bath.

A buoyant chamber secured to the dish a container not only maintains thecontainer at a predetermined height above the level of the cleansingbath in the tub, but acts as a means for aiding the operator in liftinthe dishes from the water so that little e fort on the art of theoperator is required to elevate e dishes. Furthermore, since the buoyantchamber occupies a great deal of the space of the tub and is not incommunication with the cleansing bath it will displace the bath andforce same upwardly, through, and above the dishes.

The invention will be best understood from a. consideration of thefollowing detailed description taken in connection with the accompanyingdrawing forming part of this specification, with-the understanding,

however, that the invention is not confined to any strict conformitywith the showing in the drawing, but may be changed and modified solong'as such changes and modifications mark no material departure fromthe salient features of the invention as expressed in the appendedclaims.

In the drawin s, a

Fig. 1 is an e evation of a washing machine partly in section disclosingthe flotation chamber secured to the dish container and a form ofheating means placed below the tub.

Fig. 2 isa. plan view of the washing'machine with a section of the dishtray or container removed.

Fig. 3 is a fragmentary view of the tubin section showing another formof heating means. I

Fig. 4 is a fragmentary view in section of the bearing for the operatingmeans.

Fig. 5 is a section along the line 5-5 of Fig. 2, showing the deflectingblade for driving the cleansing bath through the dish container.

The machine comprises a tub 1 having a bottom 2, mounted uponacylindrical base 3, by means of a flanged ring 4. The cylindrical baseis provided with feet 5 for supporting the tub upon the floor of a room.The top ofthe tub is reinforced by a hoop 6 and the sides, b strips 7which are bolted to the outside of t e' tub at spaced intervals.

Supported centrally of the bottom' of the. tub by" means of aninternally threaded flanged plate. 8 which is secured to the bottom byrivets 9, is a hollow rod 10 havin a threaded portion at its lower endscrewed into the internally threaded portion of. the plate. 'A screw '11:passing through the plate 8 prevents the hollow rod 10 from turning inthe plate. The upper end of the rod is secured in position in anymanner, as

by means of Slidably and rotatably mounted upon the rod is a long sleeve14 carrying the main tray 15 and the flotation chamber 16. The chamber16 is cylindrical'in form and provided with a bottom 17 which is securedto a flanged hub 18 by means of rivets 19. The hub 18 is internallythreaded, the threads engaging with threads formed upon the lower end ofthe sleeve 14. A cone-shaped extension 20 of the hub projects upwardlyupon which is secured by means of rivets 21 a reinforcing cone-shapedmember 22. The upper end ofthe reinforcing member 22 has a cylindricalformation 23 which is secured in any manner to the chamber'16.

The main trayor dishcontainer '15 is formed in sections 24, and whichsections are adapted to hold the dishes within the washing machine, isprovided with an upstanding, perforated, cylindrical rim 25 and a bottom26 which forms the top of the flotation chamber 16. The bottom 26 issecured to the top of the flotation chamber in any manner, and theconnection between the two members is reinforced by an annular bracket27.

A conical hub 28, surrounding the sleeve 14 and secured at its upper endto said sleeve, is flanged at its base portion, the flange 29 beingconnected to the bottom of the dish container by means of rivets havinga reinforcing ring 30 interposed between the flange and the base.

The dishes is divided into three sections by means of the semi-circularperforated members 31'and are provided with handles 32 in order. thatthe sections may be removed. It will be seen from an inspection of Fig.1 that the perforated base 26' of the sec-- tions slants upwardlytowards the center and rests upon the flange 29 of the conical hub 28while the periphery of the sections rests upon the bottom 26 of thecontainer. It will be seen that a space is provided between the base ofthe sections and the bottom of the container in order that the cleansingbath will more readily find access to the dish container from the tub.

The bottom of the dish container has a I series of radial perforations33 and a number of inclined deflecting blades 34 radially disposedaround the bottom of'the dish container and disposed below and at oneside of the perforations so that they will 've to the cleansing bath anupward and w irling motion through the dishes. These blades are disposedat an angle of 45.-

An operating arm 35 is connected to a bracket 36 mounted on the tub 1 bymeans .of a'link 37 having pivotal connections 38, .39, respectively,with the bracket and the operating lever. Th'e operatin arm '35 isprovided with a yoke-40 whic surrounds a ring 41 having the-.diametrica1ly disposed.

dish' container which carries the pins 42 projecting outwardly'therefromand passing through the diametrically-disposed perforations in the yoke40. This ring 41 located the anti-friction elements 4 The sleeve 14 hasa spiral slot 47 in which a pin 48 on the rod 10 is adapted to operatefor creating a reciprocatin and rotary motion to the sleeve 10 when t eoperating arm 35 is moved upwardly or downwardly. A perforation 49 isplaced at a point in the rod 10 so that when the flotation chamber anddish container are raised from the tub 1 in order to clean the tub, theymay be held at this point by placing a pin in the perforation 49 beneaththe bottom of the flotation chamber.

I have provided a means for relieving the flotation chamber-16 ofpressure from the airwithin when the chamber is heated. I haveperforated the reinforcingcone 22 at 50 so that air from the flotationchamber may escape into this cone. Perforations 51 in the bottom of thedish container 15 and the annular reinforcing member 30, and

also perforations 52 in the upper portion of.

the hub 28, permit expanded air to pass to the outside.

The perforations 52 are placed at such a heightabove the level of thecleansing bath in-the tub that they will not permit the cleansing bathescaping into the flotation chamber 16.

The flotation chamber is .of such dimensions that it will readilysupport the dishes above the level of the cleansing bath. The weight ofthe dishes will always be slightly less than the buo ancy of the chamber16 in order that littib effort will be required by the operator to raisethe lever after the dishes have been immersed because of the superiorbuoyancy of the member 16} The size of'the flotation chamber 16 is suchthat as the chamber is lowered into the water it will readily raise andforce the water upwardly, through and above the dishes in the dishcontainer.

If at any time it is found that the lifting -power of the chamber '16 isgreater than is desired, a plug 53 in the bottom of the chamber may beopened to permit sufiicient quantity of the bath to enter the chamber tolessen its lifting power and consequently support the dishes at aheightwhich; is more desirable.

A rubber bufier '54, surrounding the rod 10 and restin on the plate 8,receives the shock of the c amber if the said chamber is Ill lowered-farenough to reach that portion of Y the tub;

. An inlet pipe 55 provided with a dock 56 trolled by a cock 58, is usedto draw oil the water from the-tub. Connected with this tion of theheating device is shown in Fig.

4, in which 'a steam coil 68 is shown, placed in the bottom of'the tub 1and connected with a feed pipe 69 and controlled by the valve 70.

The operation of the device is as .fol

lows :The operator having filled the sections 10f the dish containerwith dishes, places these sections which are of semicircular form in thedish container 15. The tub 1 is filled to a predetermined height withthe cleansing bath. The operator grasps the handle 35, and by areciprocating movement, forces the yoke downwardly, carrying with it thebearing 43 and likewise the sleeve 14. As the sleeve travels downwardly,the pin 48 which is secured on the rod 10,. the free end of it beingdisposed in the spiral slotthe perforations of the dish container.

47, causes the sleeve 14 to rotate, likewise rotating the dish containerand the flotation chamber 16. These two movements, the downward movementand the rotary movement, of the chamber 16 and the dish container causesthe cleansing bath to be forced upwardly around the dishes and over thedishes by means of the blades 34 and the displacement of the cleansingbath by the flotation chamber 16. The rotary motion of the dishcontainer causes the radially disposed blades 34 to force the water in asurging and violent manner among the dishes,

therebythoroughly cleansing them. As the arm 35 is returned, thatis-with the aidof the lifting power of the chamber 16, water is drawnbackwandly through thedishes and A continued reciprocation of the arm 35thoroughly cleans the dishes and they are now ready for the rinsingbath.- It is preferable,

in this construction, to employ in conjunc tion with the washing machinea rinsing maf chine of the same type as the washing machine. Thesections, after the dishes have been thoroughly washed, are removed fromthe dish container of the washing machine and placed in the dishcontainer of the rinsing machine, and the same operation, that is ofreciprocating the lever 35, is carried on. If, in filling the dishcontainer with a cer-.

tain number of dishes, it isv found that the dish ,container rides toohigh above the cleansing bath, or, in other words, that the liftingpower of the flotation chamber 16 is too great, the plug 53 mayberemoved to allow a definite quantity of the bath .to enter the chamberinv order to reduce the lifting power of said chamber.

As the grease collects upon the surface of the cleansing bath, the valve56 may be opened to allow more of the bath into the tub to elevate thelevel of the bath and allow some of the bath and the grease which hascollected on the surface of the bath to pass out into the grease trap61. In order to drain the contents of the tub 1, the valve 58 is openedto permit the bath to be disposed of in the drain or sewer 64.

This invention may be considered as 'a sterillzing machine, as theoperator may submerge the dishes in boiling water without dangerofscalding the operator What is claimed is:

1. In a dish washing machine, a dish container, buoyant means forsupporting the dish container, and means for imparting motion to thedish container.

2. In a dish washing machine, a dish container, buoyant means connectedto the bottom of the dish container for supporting the same, and meansfor imparting motion to the container and to-the buoyant means.

3. In -a dish washing machine, a tub having a' heated cleansing bath, adish container, buoyant means for supporting the dish. container, meansfor imparting motion to the dish container, and means for relievingpressure -in said buoyant means when said buoyant means becomes heated.

4. In a dish washing machine, a dish container, buoyant means connectedto the dish container for supporting the container at .a predeterminedelevated position, means for imparting motion to the container andbuoyant means, andmeans for regulating the lifting power of the buoyantmeans.

5. In a dish Washing machine, a dish container, buoyant means connectedto the dish container for supporting the same in an elevated. position,and means for imparting both a' rotary and a reciprocatory movement tothe container and the buoyant means.

6. In'la disl r' washing machine, a dish container, buoyant meansconnected to the dish container for supporting the same. in an elevatedposition, means for imparting mo- I tion 'to the container and buoyantmeans, means for relieving pressure in said buoyant means, and meansrfor regulating the lifting 8. In a dish washing machine, the com-.

I bination of a tub adapted to contain a cleasingbath, a dish container,a flotation chamber connected to the bottom of the dish container, andmeans for raising and lowering the dish. container and chamber, theflotation chamber maintaining thedlsh container above the bath when themachine is at rest.

9. In a dish washing machine, the combination of a tub adapted tocontain a cleansing bath, a dish container, a flotation chambination ofa tub adapted to'contain a cleansing bath, means for heating thetub, adish container, a flotation chamber connected to the bottom of thedish'container, means for imparting a reciprocatory motion to said containerand chamber, said chamber having openings leading therefrom to the-outer air for relieving the pressure therein.

11. In a dish washin machine, the combination of a tub adapte to containa cleans ing bath, a dish container, buoyant means connected with saidcontainer and cooperating'with the cleansing bath to maintain the dishesin said container above the bath when the machine is at rest, means forimpartin reciprocatory motion to said container .an buoyant means, andmeans on the container for causing the bath to pass in an upward and anular direction through the dishes.

12. iii a dish washing machine, the'combination of a tub adapted tocontain a cleansing bath, a dish container, a buoyant support for thecontainer, means for imparting a rotary motion to the support, and meansfor rotating and driving portions of the bath through thecontainer.

13. In a dish washing machine, the combination of a' tub adapted tocontain a cleansing bath, a dish container, a buoyant support connectedto said container and 00-- operating with the cleansin bath to assist inelevating the dish container above the bath, a rod upon whichsaid-containemand support are movable, and means connected to thesupport and revolubly mounted on the rod for imparting both vertical androtary motion to the container and support. 14. In a dish washingmachine, the combination of a tub adapted to contain acleansing bath, acontainer for soiled dishes, means for floating said container in thebath, a rodpassing through the container and floating means, and meansslidably mounted on the rod for reciprocating. androtating-simultaneously the container and the floati means.

15. In a dish washing machine, t e combination of a tub adapted tocontain a cleans- 16. In a dish washing machine, the combination of atub adapted to contain a cleansing bath :Ifor the dishes, a containerfor the dishes, means for supporting the container comprising a hollowbody having a closed bottom resting on the bath, a reinforcing means forthe hollow body formed with- .in and secured to the bottom and sides ofsaid body, and a top for the hollow body forming the bottom of the dishcontainer.

17. In a dish'washing machine, the combination of a tub adapted tocontain a; cleansing bath for the dishes, a dish container; buoyantmeans for supporting the dish container, a rod supported within the tuband passed through the container and buoyant means, a sleeve slidablymounted on the rod and secured to the buoyant means and con- 'tainer,and means connected with the sleeve for causing simultaneously arotating and reciprocating movement to the dish container and thebuoyant supporting means.

18. In a dish washing machine, the combination with a tuband a container'for dishes, of an operating means, comprising a sleeve secured to thecontainer, a rod on which said sleeve is slidably and rotatably mounted,a pin on said rod, a spiral slot in the sleeve to receive the pin, asplit ring secured to the sleeve, a rin mounted on the split ring,'arace provided tween the split ring and the second-mentioned ring,antifriction elements located in the race, and a lever pivotally mountedon the secondmentioned ring for actuating the sleeveand the container.

19. In a washingmachine, the combination of a tub and a container fordishes adapted to be rotated and reciprocated in ,said tub, with anoperating means for. the container comprising a leverpivoted to the tub,a vertical rod secured to the tub, a sleeve-5;.havihg a spiral slotrotatably and slidably mountedon the rod, a ball bearing connectionbetween. e lever and the sleeve, and a pin on the rod operating in saidspiral slot to cause a reciprocating and rotating movement of the sleevewhen the lever is operated,

20. In a dish washing machine, a tub, a dish container, a flotationchamber secured to the bottom of the dish container and being of lessdiameter than the same, said con.- tainer having openings in the bottombeyond the connection .of the said chamber thereto. .J

21. In a dish washinglm'achine, a. tuhaa dish container, a flotationchamber secured to the bottom of the dish container and being of lessdiameter than the same, said container having openings in the bottombeyond the connection of the said chamber thereto, and inclined bladesextending from the containerbottom below the openings.

22. In a dish washing machine,a tub, a dish container, a flotationchamber secured to the bottom of the dish container, said bottomconstituting the-top. of the chamber, and a cone-shaped member arrangedwithin the chamber and secured at the top and bottom thereto.

23. In a dish I washing machine, a dish container having its bottomprovided with perforations, and inclined rigid blades depending from thebottom side of the perforations.

24. In a dish washing machine, a dish container-consisting of aperforated bottom and a perforated rim, a series of semi-circularremovable sections supported' within the container, with the bottom ofthe sections supported above the bottom of the container;

below and at one In testimony, that I claim the foregoing as my own, Ihave hereto affixed my signature.

DOUGLAS PLEASANT MAGANN.

